319720812 has 12 divisors (see below), whose sum is σ = 746015256. Its totient is φ = 106573600.

The previous prime is 319720799. The next prime is 319720859. The reversal of 319720812 is 218027913.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13321689 + ... + 13321712.

It is an arithmetic number, because the mean of its divisors is an integer number (62167938).

Almost surely, 2^319720812 is an apocalyptic number.

It is an amenable number.

319720812 is an abundant number, since it is smaller than the sum of its proper divisors (426294444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

319720812 is a wasteful number, since it uses less digits than its factorization.

319720812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26643408 (or 26643406 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 319720812 is about 17880.7385753497. The cubic root of 319720812 is about 683.7914021410.

The spelling of 319720812 in words is "three hundred nineteen million, seven hundred twenty thousand, eight hundred twelve".